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Product Description

The Impedance Analyzer for Analog Discovery was designed with automatically adjusting reference resistors and relays to aid in use of the Impedance Analyzer tool in WaveForms. With the Impedance Analyzer accessory, the Analog Discovery will automatically select the most appropriate configuration for the attached unknown impedance. The Impedance Analyzer is loaded with the 2×15 Analog Discovery connector, which makes it compatible with Analog Discovery 2 as well as Analog Discovery Legacy.

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Impedance analyzer

Posted by gstevens37@charter.net on 25th Feb 2019

used the device to measure parameters of low frequency solenoid, one that could expect inductance formulas to work. The device was right on for the inductance, but measures series resistance and self-resonant frequency, which is difficult to calculate accurately. Very pleased with the device. Agree the DUT connector is problematic though. I simply stripped some solid wire & attached alligator clips to the remote device. Performed open & short tests first, though. In spite of the DUT connector I think it still worth a five.

Works great

Posted by joe hubler on 2nd Dec 2018

Worked better than I thought it would, and for the price, you just can't beat it.

Handy add-on

Posted by Unknown on 8th Aug 2018

This add-on board makes doing impedance testing so much easier, smoother and faster.
I've used it for testing coils, caps filters etc, and found it to be pretty trustworthy.
A great quick learning tool.

More accurate than I expected

Posted by gasstationwithoutpumps on 7th Jul 2018

I reviewed this at https://gasstationwithoutpumps.wordpress.com/2018/07/01/analog-discovery-impedance-analyzer/

The board works fairly well, if you do the open-circuit and short-circuit compensation. I think that the reference resistors are mostly 0.2% components (accuracy is not specified on the data sheet).

I was a little surprised by the use of latching relays with up to 100mΩ contact resistance—lower resistance is possible with FET switches.

The connector used for DUT requires long leads (a shorting plug made with double-ended male headers was not long enough to reach the contacts), which may cause problems for measuring some components, requiring adding extra wiring.